/Engine/Source/Developer/Localization/Public/LocTextHelper.h
Add a new translation to the given archive.
Returns true if it was added successfully, false otherwise.
bool AddTranslation ( const [FString](API\Runtime\Core\Containers\FString) & InCulture, const [FLocKey](API\Runtime\Core\Internationalization\FLocKey) & InNamespace, const [FLocKey](API\Runtime\Core\Internationalization\FLocKey) & InKey, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FLocMetadataObject](API\Runtime\Core\Internationalization\FLocMetadataObject) > & InKeyMetadataObj, const [FLocItem](API\Runtime\Core\Internationalization\FLocItem) & InSource, const [FLocItem](API\Runtime\Core\Internationalization\FLocItem) & InTranslation, const bool InOptional )